freedreno/a6xx: Don't blit with R2D_RAW

Map all formats to a valid ifmt.  FMT6_10_10_10_2_UNORM_DEST still
doesn't work on the blitter so keep that one on the u_blitter path.

Fixes
dEQP-GLES31.functional.draw_buffers_indexed.random.max_implementation_draw_buffers.*
with FD_MESA_DEBUG=nogmem.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5717>
4 files changed